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Gauche1968
Samba Member
Joined: April 13, 2006
Posts: 1518
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 Posted: Tue Sep 13, 2016 6:29 pm Post subject: 1.9L Oil Preasure Warning Light |
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Its a 1.9L with the single oil pressure warning sensor. The light started flickering about 240 miles into a 300 mile drive. The flickering is not correlated with engine RPM. It will flicker at idle and flicker at 3000 RPM. Did an emergency oil change with 20W 50. Did not change the Mann filter, as I didn't want to use a cheap one from Auto Zone. If I understand it correctly the 1.9L switch should only indicate a true oil pressure problem below 2000 RPM?
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1984 Vanagon GL
1984 Vanagon Westy |
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dhaavers
Samba Member
Joined: March 19, 2010
Posts: 7751
Location: NE MN (tinyurl.com/dhaaverslocation)
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| Posted: Tue Sep 13, 2016 6:35 pm Post subject: Re: 1.9L Oil Preasure Warning Light |
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...unless the wiring has gone wonky or the engine bay connector is melted from proximity to the exhaust... 
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86 White Wolfsburg Westy Weekender
"The WonderVan"
<EDITED TO PROTECT INNOCENT PIXELS> |
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crazyvwvanman
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Joined: January 28, 2008
Posts: 9914
Location: Orbiting San Diego
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| Posted: Tue Sep 13, 2016 6:37 pm Post subject: Re: 1.9L Oil Preasure Warning Light |
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The single switch on 1.9 works at all rpms. For example if the oil filter seal blows out at highway speeds the light will come on.
Most likely your problem is the wire to the oil switch has rubbed against metal somewhere and now the insulation has worn through enough to short out and make the light come on. Look all along the switch wire, most likely it is touching an exhaust pipe but any metal could wear through it.
Mark |
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Gauche1968
Samba Member
Joined: April 13, 2006
Posts: 1518
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| Posted: Tue Sep 13, 2016 6:41 pm Post subject: Re: 1.9L Oil Preasure Warning Light |
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| dhaavers wrote: |
| ...unless the wiring has gone wonky or the engine bay connector is melted from proximity to the exhaust... |
Right, in which case it would moat likely be a false alarm if the light is flickering above 2000 RPM?
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bluebus86
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Joined: September 02, 2010
Posts: 11075
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Gauche1968
Samba Member
Joined: April 13, 2006
Posts: 1518
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| Posted: Wed Sep 14, 2016 10:47 am Post subject: Re: 1.9L Oil Preasure Warning Light |
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Wire looks pretty well burned right at the junction point. I am hoping that is the problem. It runs fine, has a fresh oil change and shows no other signs of malfunction.
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1984 Vanagon Westy |
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Thebeas
Samba Member
Joined: February 27, 2015
Posts: 159
Location: Mississippi
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| Posted: Wed Sep 14, 2016 12:01 pm Post subject: Re: 1.9L Oil Preasure Warning Light |
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I had the exact same problem with my 1.9. New switch solved the problem.
My old switch had a little bit of that teflon tape that was probably the reason for the flicker.
At $5 for the new switch I didn't care to go back to the old one.
http://www.van-cafe.com/home/van/page_356
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